NERVOUS
NEUROGLIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following statements is true?
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Neurolemmocytes form a myelin sheath around axons in the peripheral nervous system, and oligodendrocytes form a myelin sheath around axons in the central nervous system.
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Astrocytes form a myelin sheath around axons in both the peripheral nervous system and the central nervous system.
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Schwann cells are the same as oligodendrocytes, and they both act as phagocytic cells to provide protection for the neuron.
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All of the above
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Explanation:
Detailed explanation-1: -In the central nervous system, myelin is formed by multipolar glia, oligodendrocytes, that can extend dozens of slender cell processes to ensheath multiple axons simultaneously.
Detailed explanation-2: -Schwann cells make myelin in the peripheral nervous system (PNS: nerves) and oligodendrocytes in the central nervous system (CNS: brain and spinal cord). In the PNS, one Schwann cell forms a single myelin sheath (Figure 1A).
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